Oracle picked Friday the 13th, a day steeped in tales of mayhem and open combat, for a reason. Clearly, Oracle means to send Google a message that it has the will and is ready for War!

Apparently, Oracle charges hefty license fees for the use of its commercial JVM. To build a more profitable Android platform, Google built its own VM called Dalvik. Dalvik itself is built on a subset of the Apache Harmony Java implementation.